Method of making stereotype-matrices.



, H. A. WOOD. METHOD OF MAKINQSTEREOTYPE MATRICES.

APPILIOATION FILED JULY is, 1909. v

Patented Feb. 2, 1915.

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H. A. W. WOOD. METHOD OF MAKING STEREOTYPE MATRICES.

APPLICATION FILED JULY 16 Patented Feb. 2, 1915.

2 SHEETS-SHEET 2.

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HENRY A. WISE WOOD, OF NEW YORK,N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, T

WOOD NEWSPAPER MACHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORA-TION 0F VIRGINIA.

METHOD OF MAIHNG STERE'OTYPE-MATRICES.

Patented Feb. 2, 1915.

Application filed July 16, 1999. Serial No. 507,934.

To all whom it may concern:

Be it known that. I, HENRY A. WISE Wool),

I a. citizen of the United States, residing at New York, in the countyof New York and State of New York, have invented a new and useful Methodof Making Stereotype- Matrice's, of which the following is aspecification.

This invention relates to a method of making stereotype matrices. Asordinarily made these matrices are molded by being pressed under a feltmolding blanket, and as this is soft and elastic it will push the fiongwhich is moist and soft further down upon the small characters of typethan it Will upon the large ones, so that the matrix as produced will bethinner over these small characters. Therefore while the plane of allthe characters that ought to beef the same height is the same upon theface of the matrix when it is removedfrom the'type, the thickness of thematrix at the back varies, so that when it is ut into the casting -boxand the metal intro uced the pressure tends to force the back of thematrix against the uniform surface of the box, so that the letters arecast withtheir printing surfaces at different heights. This is one ofthe reasons why stereotyping is not suitablefor a high qualityof'printing, and the principal object of this invention is to provide amethod of making a matrix which will entirely obviate this difficultyand produce a this method; Fig. 2 is a similar view showing the nextoperation; Fig. 3 is a similar view showing the completion of the lastnamed operation; Figs. 4: and 5 are similar" views showing a slightmodification; Fig.

characters as for example, periods, commas,

is, ls, ts, etc., may be considered. to force themselves more deeplyinto the fl'ong than the wide characters, as for example ws, ms, andcapital letters, so that the fl'ong is pushed down farther on the smallcharacters 6' isfa plan of part of Fig. 5 on a small scale,

and the matrix will be left thinner over their tops, as for example,where it protrudes at-the points 15; whereas over the large characters acomparatively thick body of fiong will be left to form protrusions 16.Thus while-the plane of all the characters may be the same upon the faceof the matrix when it is removed from the type the matrix will be ofvarying thickness at the back of the letter impressions. Therefore, whenthe matrix is put into the casting box and the metal introduced thepressure of the latter will tend to force the back of the matrix firmlyagainst the surface of the box which is a uniform plane orsemi-cylinder, and thus the surface of the various cast letters willappear in planes of different heights. In order to avoid this difiicultyaccording to the form of the present method shown in Figs. 1, 2 and 3,the matrix is molded in the usual ,way by the use of a platen, roller,or other pressingmeans. Then the blanket is removed and the platenbrought down as shown in Figs. 2 and 3 until it engages a stop, as forexample, 17, which is so proportioned that it will permit the platen tobe brought down on the rear surface of the matrix so as ,to'moldtheprotuberances 15 and'16 all to the same height and leave the top oftheir surfaces in a perfect plane.

Another way in which this can be accomplished is shown in Fig. 4, inwhich the flong has first been molded with a blanket beneath a. moldingmachine roll 20, and then after. the blanket is removed, a plate 21 ofthe same thickness as blanket is when pressed, is introduced and theplate 21' together with the type and matrix are run beneath the roll asindicated in Fig. at. Or if desired the roll is brought to the plane ofthe back of the matrix, and the matrix and type are then run beneath theroll with the latter in direct contact with the back of the matrix.

In the form of the invention shown in Fig. 5 the second molding of thematrix is accomplished while the latter is still wet and in contact withthe type by passing it under a smooth rotating disk 25. By rotating thedisk a moving surface for smoothing the matrix is provided.

According .to all these forms of the method itwillbe understood that theblanket, which may be of felt, is used as is ordinarily the case, and.is .removed after molding and then the process is completed by theaddition of the step of conforming the protrusions on the back of thematrix to a perfect level or uniform surface so that all the letters,characters, and illustrations whether they be small or large, shall havethe correct thickness of mat above them so that the letter plane of theface of the mat and the plane of the back will be in proper relation.After this has been done' and the form removed from the platen, thematrix is dried in'the usual way either in contact with the type whichis preferable, or after it has been stripped from thesame.

Another way in which the invention can be carried out is to do awayentirely with the blanket, and mold the back of the matrix directly bythe platen, roller, disk, or

. the like without the interposition of any soft backing. This isparticularly suitable in cases where very fine and shallow lettersorillustrations are used, and it does away with one operation as will beobvious.

In Fig. 7 is shown another modification of the method in which the typeand flong are passed under the roller 27 which may be revolved either inthe same direction and at the same surface speed as that of the matrixor faster, or in the opposite direction. If this is done while thematrix is still wet a smooth surfaced roller is employed, but if it isdesired to do this after the matrix has been dried, a roller is employedhaving an abrading surface, and in that case it is rotated' at adifferent speed or in a different direction from the direction of travelof the surface of the matrix. It may be stated also that in this casethe disk as shown in Fig. 5 may be used having an abrading lowersurface. As a substitute for the latter methods,

or in addition thereto a long straight knife 28 may be employed for thepurpose of skiving down the back of the matrix to a uniform thicknesswhen the matrix is dried, I

and before or after it is removed from the type, as shown in Fig. 8. 1

It will be seen that as the matrix has a It will be understood that theseveral ways of carrying out this invention which have beendescribed'are mentioned for illustra tive purposes, and that theinvention can .be carried out in many other ways without departing fromthe scope of the invention as expressed in the claims. Therefore, I donot wish to be limited to the exact steps shown and described, but iWhat I do claim is 1. A method of molding stereotype matrices whichcomprises placing the flong on the type, placing a molding blanket onthe flong, pressing the flong thereby into close contact with the type,removing the blanket and reducing the surfaces of the upwardlyprojectingparts Qfthe matrix to a uniform upper plane.

2. A method of making stereotype matrices which comprises placing theflong on the type, placing a molding blanket on the flong,.forcing theflong intoclose contact .with the type, removing the blanket,

reducing the surfaces of the upwardly pro-- jecting parts of the matrixto a uniform upper plane while still moist, and finally removing thematrix from the type.

3. A method of making stereotype matrices which comprises placing theflong on the type, placing a molding blanket on the flong, forcing theflong into close contact with the type, removing the blanket,

and molding the upwardly projecting parts of the flong or matrix to auniform level.

' 4. A method of making stereotype matriceswhich comprises molding theflong on the type by means of a molding blanket, removing the blanket,and while the matrix is still soft or'plastic compressing the upwardlyprotruding portions thereof to a uniform plane. v 5. A method of makingstereotype matrices which comprises placing the flong on the type,placing a molding blanket on the flong, forcing the flong into closecontact with the type, removing the blanket and pressing-the outersurface of the matrix with a flat platen to bring the upwardlyprotruding portions ofthe matrix to a uniform plane.

6. A method of making stereotype matrices which comprisesplacingtheflong on the type, pressing ityieldingly on the type,

I while still piast ic; to provide a, type impressi on on the front faceand an irregular surface'lm the'rear face having upwardly protrudingportions of difierentfheightgand treating said irregular rear surface ofthe matrix tb brin the upwardly protruding portions thereoi to a uniformheight on the back.

In testimony whereof I have hereunto set my hand, in the presence of twosubscribing 10 Witnesses.

H. A. WISE WOOD.

' Witnessesz 1 ETHEL V. HARDER ANNIE B. WALTERS.

